package com.allen.service.impl;

import com.allen.bean.Category;
import com.allen.bean.Dish;
import com.allen.bean.Setmeal;
import com.allen.common.CustomException;
import com.allen.dao.CategoryDao;
import com.allen.service.CategoryService;
import com.allen.service.DishService;
import com.allen.service.SetmealService;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * @author dragon1006xu@gmail.com
 * @create 2022/2/17 16:37
 */
@Service
@Slf4j
public class CategoryServiceImpl extends ServiceImpl<CategoryDao, Category> implements CategoryService {

    @Autowired
    private DishService dishService;
    @Autowired
    private SetmealService setmealService;
    /**
     * 根据id删除分类，删除之前需要进行判断
     *
     * @param id
     */
    @Override
    public void remove(Long id) {
        //添加查询条件，根据分类id进行查询菜品数据
        LambdaQueryWrapper<Dish> dishLambdaQueryWrapper = new LambdaQueryWrapper<>();
        dishLambdaQueryWrapper.eq(Dish::getCategoryId, id);
        int count1 = dishService.count(dishLambdaQueryWrapper);
        //如果已经关联，抛出一个业务异常
        if (count1 > 0) {
            throw new CustomException("当前分类下关联了菜品，不能删除"); //已经关联菜品，抛出一个业务异常
        }
            //查询当分类是否关联了套餐，如果已经关联，抛出一个业务异常
        LambdaQueryWrapper<Setmeal> setmeallambdaQueryWrapper = new LambdaQueryWrapper<>();
        setmeallambdaQueryWrapper.eq(Setmeal::getCategoryId, id);
        int count2 = setmealService.count(setmeallambdaQueryWrapper);
        if (count2 > 0) {
            throw new CustomException("当前分类下关联了套餐，不能删除"); //已经关联套餐，抛出一个业务异常
        }
        //正常删除分类
        super.removeById(id);
    }
}
